Heater



J. LA R. ROBINSON.

HEATER.

APPLICATION FILED JUNE 18,

Patented Feb. 14, 1922.

2 SHEETS--SHEET wagwlllwllogm INVENTOR. LaRue Habmsann N m .T. T A

J. LA R. ROBINSON.

HEATER.

APPLICATION FILED JUNE 18, 1920.

1 ,406,900, Patented Feb. 14, 1922.

2 SHEETS-SHEET 2- .9 INVENTOR.

J- LaHue Fabz'nso' n.

A TTORNEY.

UNITED STATES PATENT OFFICE.

JOHN LA RUE ROBINSON, OF RENO, NEVADA, ASSEG-NOR T0 RENO OETIOAL COMPANY, OF RENO, NEVADA, A CORPORATION OF NEVADA.

HEATER.

Applicationfilecl June 18,

T 0 all 107mmz't may concern.

Be it known that I, JOHN LA RUE ROBIN- sozv, a citizen of the United S ates, residing' at Reno, in the county of lVashoe and State of Nevada, have invented certain new and useful Improvements'in Heaters; and I do hereby declare the following to be a full, clear, and exact description o't'the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to heating pads adapted to be applied to areas of the body and to be used for warming and curative purposes and it consists in the novel features hereinafter described and claimed An object of the invention is to provide a heating pad of the character stated which is of simple and durable structure and which has its parts so arranged that they are not liable of becoming disarranged when the device is applied and consequently the heating pad. is a safe medium which may be used by those, practically inexperienced, and without danger of burning the person to which the pad is applied.

ll ith this object in view, the pad comprises metallic casing which is convexoconcave in transverse section and circular in plan.

A resistance element is located in the heater body and is connected with conducting wires which in turn may be connected in any suitable manner with a source of electrical supply, preferably of a voltage not to exceed 110. At the point where the wires pass through the side of the heater body, tl eyare surrounded by a coil of wire which is attached to the heater body and this coil prevents the insulation of the condu tor wires from cutting and causing short circult A heat resisting mat is located in the heater body at the outer side thereof and is designed to prevent the heat from passing through or radiating; from the outer side of the heater body and consequently the heat in emerging from the heater body must pass through the inner side thereof and toward the portion of the heater body of the wearer to which the device is applied. An envelope of special design is provided to receive the heater body, and the said envelope is preterably made oi canton; flannel and is provided Specification of Letters Patent.

Patented Feb. 145, 1922.

1920. Serial No. 389,889.

In the accompanying drawings Figure 1 is a plan view of the complete pad,

Figure 2 is a similar view of the heater thereof,

Figure 3 is a similar view of the electric current conducting means of the heater,

Figure is a perspective view of the parts, separated, which form the heating body Figure 5 is a plan view of the envelope.

Figure 6 is a cross-sectional view oil? the heater pad or body.

Figure 7 is a cross-sectional view of the envelope to contain the heater pad.

Figures 8 and 9, respectively, are plan and cross-sectional views of a base or support for the heater, and

Figures 10 and 11, respectively, are longitudinal and transverse sectional views oi he radiator or resistance element employed.

As illustrated in the acconuianying drawin 'gs, "ie heating pad comprises a body composed or an inner plate 2 and an outer plate 23. These plates are secured together at their cdgys and the plates are circular in plan and convene-concave in transve 'se section,

it resistance element l: is located in he body l between the plates 2 and 3 thereof and approximately at the center oi the body. This resistance element is of usual "form and may consist ot a tubular body or clay or other material enclosing a wire havingresistance charlu'teristics or feature Current wires 5 pass through the plate 3 and are connected with the resistance element l in a usual manner. These wires connect at their outer ends with a phre;- l' which may be screwed. into the socket of an electric lix lure and whereby the cu: may be supplied to the resistance clement when the device is applied and in use. It heat resis-a ing material is located in the body ll adjacent the inner s riace of the plate and between the plate 27 and the resistance cle ment and this heat resisting material is adapted. to prevent heat from passing out of the body to any great extent, through the plate and directs the heat toward the plate 2 through which it eventually passes out of tee body 1 A wire coil 8 is attached to the plate and surrounds the wires 5 in the vicinity of the plate and prevents the edges of the openings in the plate through which the wires pass from cutting the insulation of the wires and thereby causing short circuit.

In conjunction with the heating apparatus hereinbe-lore described, an envelope is used for receiving the same when the device is applied to a person and the said envelope will now be described. The envelope comprises an inner side portion 9 preferably of canton flannel and which is circular in plan. The envelope also includes flap portions 10 which are sewed at their outer edges to the edge of the portion 9 and the inner parts or the flaps 10 overlap each other thereby pro- 'viding halt pockets at the side portions of the part 9 and the pockets may receive the circular body 1. Tapes 11 are sewed to the inner parts of the flaps 10 and one of the tapes may extend through a slot 12 provided in one of the flaps whereby the edge portions of the flaps may lie snugly against each other, and the tapes may be carried around the front or outer surface of the part 9 and secured together by tying or any other suitable means.

\Vhen the parts are assembled as indicated, the heating pad may be applied to any point of the body and when the electric current is turned on the heat which is generated at the resistance element 4 radiates from the same and passes through the inner side of the bed 1 l and the fla )S of the envelo e and comes in contact with the portion of the body of the user to which the device is applied.

In seine instances it may be desirable to use the heater for warming fluids, as for instance, mill: or foods to be given infants, or invalids, and in this event a stool 14; having a concaved upper surface is provided and the said stool is placed upon a table top or other support and the body 1 in an inverted positionis placed upon the stool. The vessel containing the "food or material to be heated is placed upon the upper sur face of the plate 2 and when the current is turned on and the heat generated, the said fluid or material will be heated in a manner which is apparent.

Having described the invention, what is claimed is I. A heater pad for local application coniprisine; separable sections, heating means intermediate the sections, and means associated with one section to direct and confine the heat to the other section.

2. A heater pad for local application O01Ilprising separable sections, heating means intermediate the sections, and means associated with one section to direct and confine the heat to the other section, and to this end being substantially concaved opposite the other section, and heat insulating means in the concavity.

3. An envelope of the class described having overlapping closure portions, one of .aid portions having an opening at a distance from free edge, a fastening elen'ient ex tending from the other portion through the opening to effect a substantially flat closure.

In testimony whereof I atlix my signature in presence of a witness.

JOHN LA RUE ROBINSON.

\Vitn css MARY CAPEZZOLI. 

